To north east



March 10, 1933. F. F. DQRSEY IGNITION CIRCUIT CONTROLLER Filed Sept. 12, 1929 Patented Mar. 10, 1931 UNITED STATES, PATENT FFICE FARNUM F. DORSEY, OF BOCHESTERJNEW YORK, ASSIGN'OR, IBY MESNE ASSIGNMENTO,

TO NORTH EAST APPLIANCE CORPORATION, OF ROCHESTER, NEW YORK, A CORPORA- TION OF NEW YORK IGNITION -CIRCUIT CONTROLLElt Application filed September 12, 1929. Serial No. 392,194.

This invention relates to a circuit controller of the kind used in connection with the electric ignition apparatus of an mternal combustion engine.

5 Any apparatus of the kind in questlon commonly comprises two contact members, one of which is supported in normally stationary but adjustable position, while the other iscarried by a lever on other movlng member actuated intermittently by a cam. For the purpose of adjusting the stationary contact, it is common to mount it upon a plate or block. which is normally held fixed by a binding screw, but which may be slid adjust the position of the stationary contact.

The adjusting movement just referred to is usually very slight, so that it is desirable to make some special provision for performing it with the necessary precision. The object of the present invention is to produce a circuit controller having such provision, but of simple and inexpensive construction. This has been accomplished without the provision of any additional parts or mechanism, but merely by a par ticular formation of the parts which are essential to the circuit controller.

The invention is more particularly described in connection with the description of the embodiment thereof illustrated in the accompanying drawings, in which Fig. 1 is a plan view of the circuit controller; Fig. 2 is a side elevation, in section on the line 2-2 in Fig. 1, but with the cam omitted; and Fig. 3 is a detail plan view showing a modified form of the invention.

The invention is illustrated as embodied in a circuit controllerbomprisin theusual' base plate 5, a vertical pivot 6 xed to the base plate, and acontact lever 7'- pivoted on the stud and actuated by a rotarycam- 8. The contact lever carries the usual contact 9, which cooperates with the stationary contact 10.

The stationary contact is fixed on a vertical lug 11, forming part of a sheet-metal arm 12 which lies flat against the upper surface of. the base plate. The arm 12 is pivoted at one end, upon the stud 6, so that or swung, when the screw is loosened, to.

- faces on the it may have a swinging movement to adjust Eh? osition of the stationar contact. It is e a binding screw 13, WhlCh passes through a slot in the arm and is threaded into the base plate in the usual manner.

The construction as so far described is not novel. The invention resides particularly in the formation of the arm and the base plate in such a manner as to provide, upon each, a recess of some sort, these recesses being so located that they may be engaged simultaneously by the end of a screw driver or similar tool. As shown in Fig. 1, the recess in the arm has the form of a notch 14, while the recess on provided by the space between two lugs15 struck up from the metal of the plate. When the binding screw 13 is loosened by means of a screw driver, the end of the screw driver may then be interposed between the lugs 15 and also partly in the notch 14:,

in its adjustment positlon by means of" the plate is so that by turning the screw driver slightly I arm in its adjusted position.

The necessary recesses or abutment surparts may be provided in various ways. Fig. 3 shows the arm as provided with a hole 16, lying partly above a similar hole 17 in the base plate. These holes have oppositelydisposed narrow extremities adapted to engage, simultaneously,

opposite edges of the screwdriver blade, so that the arm may be adjusted by turning the screw driver the same as in the construction of Figs. 1 and 2.

The invention claimed is:

'1. A circuit controller of the type comprising a moving contact member, a nor- "mally stationary contact member, a support for the stationary contact member, a base member on which said support is adjustably mounted, adjacent recesses formed in the support. and base member to embrace simultaneously the opposite edges of a screwdriver or like tool, so that the support may be adjusted upon the base by turning the tool, and means for fixing the support in adjusted position upon the base member.

2. A circuit controller of the type comprising a moving contact member, a nor- 5 mally stationary contact member, a base plate, a support, for the stationary contact member, in the form of an arm pivoted to and lying against the base late and having a notch in its edge, a bin ing screw 1 for clam ing said. arm in adjustedvposition against t e base plate, two lugs on the base plate providing a recess adjacent to and in te plane of the notch in the arm, said notch and saidrecess being engageable simulta- -neous1y-bya screw driver or like tool to adjust the armby rotation of the tool.

' --FARNUM F. DORSEY. 

